The magnetic field produced by 1 m long and very thin straight current (I) carrying conductor at any point on the conductor itself, is

Options :
  1. infinite
  2. zero
  3. both are possible
  4. not of the above

Answer and Explanation :-

Answer: Option 2


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One might be led to question whether the scientists acted wisely in presenting the statesmen of the world with this appalling problem. Actually there was no choice. Once basic knowledge is acquired, any attempt at preventing its fruition would be as futile as hoping to stop the earth from revolving around the sun. Enrico Fermi, Collected Papers of Enrico Fermi: The United States,